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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >A study of soil surface characteristics in a small watershed in the hilly, gullied area on the Chinese Loess Plateau
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A study of soil surface characteristics in a small watershed in the hilly, gullied area on the Chinese Loess Plateau

机译：黄土高原丘陵沟壑区小流域土壤表面特征研究

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摘要

Soil surface characteristics are closely related to soil surface depressional storage, infiltration, runoff generation and soil erosion, especially in highly erodible loess soil. Soil surface random roughness, soil cohesion and aggregate stability are necessary parameters in the Limburg Soil Erosion Model (LISEM) and helpful in developing alternative land-use and conservation strategies. Over a period of 2 years, soil surface characteristics were measured continuously in Danangou, a small catchment in the hilly, gullied loess area in China, with the support of the Erochina project. The results show that soil surface random roughness, soil cohesion and aggregate stability differed significantly between land-use types. Ranking the types on soil roughness during the monitoring period yielded the sequence cropland>orchard and wasteland and fallow land>shrubland>woodland. The corresponding sequence for aggregate stability was approximately wasteland and woodland>cropland and orchard>shrubland>fallow land. Cohesion in the different land-use types in the catchment was smallest for cropland and largest for wasteland. There were no significant differences between croplands with different topographical characteristics. All of these soil surface characteristics showed significant temporal variation over the monitoring period. Temporal variations in roughness for shrubland and woodland over the 2-year period were significantly greater than those for other land-use types. There were also considerable variations in cohesion for shrubland, woodland and wasteland. In 1998, the weighted average values of roughness, aggregate stability and cohesion for the entire catchment were 1.113 cm, 13.6 drops and 0.131 kg/cm(2), respectively, with C.V. values of 9.6%, 32.05% and 21.11%. The corresponding values for 1999 were 1.616 cm, 11.52 drops and 0.100 kg/cm(2), with C.V. values of 16.0%, 15.41% and 33.33%
机译：土壤表面特征与土壤表层凹陷的储藏，入渗，径流的产生和土壤侵蚀密切相关，尤其是在高度易蚀的黄土土壤中。土壤表面随机粗糙度，土壤凝聚力和团聚体稳定性是林堡土壤侵蚀模型（LISEM）的必要参数，有助于开发替代的土地利用和保护策略。在Erochina项目的支持下，历时2年，在中国丘陵黄土丘陵区的一个小流域Danangou连续测量了土壤表面特征。结果表明，不同土地利用类型的土壤表面随机粗糙度，内聚力和团聚体稳定性差异显着。在监测期内对土壤粗糙度类型进行排序，得出了耕地>果园和荒地，休耕地>灌木地>林地的顺序。聚集体稳定性的相应顺序大致是荒地和林地>农田和果园>灌木地>休耕地。流域内不同土地利用类型的凝聚力，耕地最小，荒地最大。具有不同地形特征的农田之间没有显着差异。在监测期间，所有这些土壤表面特征均表现出明显的时间变化。两年期间灌木丛和林地的粗糙度随时间变化明显大于其他土地利用类型。灌木丛，林地和荒地的内聚力也有很大差异。 1998年，整个流域的粗糙度，集料稳定性和内聚力的加权平均值分别为C.V.1.113 cm，13.6滴和0.131 kg / cm（2）。值分别为9.6％，32.05％和21.11％。 1999年的相应值是C.V.的1.616 cm，11.52滴和0.100 kg / cm（2）。值分别为16.0％，15.41％和33.33％

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